Need help from veterans. I am new to tanks, and this is my first one. When I first got it, I filled it per the instructions, and all went well. I vaped on it all day and it was great! Time to refill - did it, all went well. Left it sit on its side overnight, started it the next morning and got a mouth full of juice. I thought, no problem, I'll just blow through it and clear it, still got a mouth full of juice, and now it started leaking out the end onto the contact point on the MOD. Nearly OD'd on nicotine before it was all over and had a long drive with no nic fix. What did I do wrong? While filling/refilling I was very careful NOT to get any juice in the atomizer inside.